diff --git a/usb/v1_1/IUsbInterface.idl b/usb/v1_1/IUsbInterface.idl
index 9d77f712b62e67ebba26a666f2b92e291275f46e..d25494a1f61b97a5e772f4c980c719aecbb0d6f9 100644
--- a/usb/v1_1/IUsbInterface.idl
+++ b/usb/v1_1/IUsbInterface.idl
@@ -144,4 +144,35 @@ interface IUsbInterface extends ohos.hdi.usb.v1_0.IUsbInterface{
      * @version 1.0
      */
     ResetDevice([in] struct UsbDev dev);
+
+    /* *
+     * @brief Get Accessory Strings.
+     *
+     * @param accessoryInfo Indicates the accessory information.
+     *
+     * @return Returns <b>0</b> if the operation is successful; returns a non-0 value if the operation fails.
+     * @since 5.0
+     * @version 1.0
+     */
+    GetAccessoryStrings([out] String[] accessoryInfo);
+
+    /* *
+     * @brief open the accessory.
+     *
+     * @param fd accessory file descriptor
+     *
+     * @return Returns <b>0</b> if the operation is successful; returns a non-0 value if the operation fails.
+     * @since 5.0
+     * @version 1.0
+     */
+    OpenAccessory([out] FileDescriptor fd);
+
+    /* *
+     * @brief close the accessory.
+     *
+     * @return Returns <b>0</b> if the operation is successful; returns a non-0 value if the operation fails.
+     * @since 5.0
+     * @version 1.0
+     */
+    CloseAccessory();
 }
\ No newline at end of file